Pan for bakers  use



(No Model.)

J. H. MITCHELL.

PAN FOR BAKERS USE.

No. 344,193. Patented June 22, 1886.

N. PETERS, Phnm-Lnhu n hur. Wishingion. D. C.

J. HENRY MITCHELL, OF PHILADELPHTA, PENNSYLVANIA.

PAN FOR BAKERS USE.

.IIPEOIFICATIOII forming part of Letters Patent No. 344:,193, dated June 22, 1886. Application filed January 25, 18%6. Serial No. 189,595. (No model.)

To all whom, it may concern:

Be it known that I, J. HENRY MI'roIInLL, of Philadelphia, in the State of Pennsylvania, haveinvented certain new and useful'lmprovements in Pans for Bakers Use,whereof the following is a specification, reference being had to the accompanying drawings.

As heretofore constructed such pans have usually been made by taking a thin sheet of metal and wiring the edges thereof in the ordinary manner by lapping. This method of construction is not only uneconomical in labor, but does not give the requisite strength to the pan at the points where breakage is most likely to occur, and permits the buckling up or warping of the sheet under the effects of heat, so that its surface soon becomes uneven. The joints, moreover, are of such character as to catch grease and foreign matters.

The object of my invention is to produce by a mode of construction which is very simple a pan which has its greatest strength at the needed parts, which presents the least access for the lodging of grease, &c., and which, as far as possible, protects the sheet metal from warping or buckling.

My invention has the further advantage that the pan has no top or bottom, properly speaking, but either side can be used at pleasure, whereas in the former method of construction it was customary to use only one side of the pan.

In the accompanying drawings, Figure 1 represents a plan view of a pan, showing in different parts various stages of its construction. Figs. 2 and 3 are sectional views thereof on the lines X X and Y Y, respectively. Fig. iis a perspective view of the lockingpiece by which the wire rim is secured to the sheet metal of the pan. Fig. 5 is a perspective view of a portion of the edge ofthe sheet metal as prepared for the reception of theloekingpiece; and Fig. 6 is a sectional view 011 an enlarged scale, showing the completed joint formed by the locking-piece and the sheet metal of the pan.

In said drawings, A represents a sheet of metal, preferably steel, which may be of any desired size and shape, the corners, however, being preferably rounded, as shown. Aseries of cuts is made upon the edges of the sheetA,

said cuts being at short intervals and extending inward,say, for one-fourth of an inch, and the intervening pieces are bent, as shown at O G, Fig.5, alternately in opposite directions, so as to form a series of inwardly-prejecting wings along the entire straight portions of the edge and upon each side of the sheet. .A rim, B, of heavy iron wire its closely around the edge of the sheet and is secured thereto by meansofthelocking-piece D. (See Fig.4.) This locking-piece consists of a strip of wroughtirou, which I prefer to make somewhat heavier then the metal of the pan itself. Said strip is bent longitudinally, as shown at c, the curvature being such as to fit snugly around the wire rim B. The edges of the piece D are turned or folded inward, forming flanges (I, of adepth somewhat less than the depth of the wings G C, as seen atthe left-hand end of Fi 2, and the right-ln'ind end of Fig. 3.

The wire rim having been inserted in the locking-piece D,the llangesd are slipped over the wings G C, so as to engage therewith, and then tightly closed by suitable machinery down upon the metalol' the pan until thejoint assumes the shape shown in the sectional View of Fig. 6, where it will be seen that the wings C C are flattened down into a horizontal position and interlocked with the continuous flanges (Z (Z of the locking-piece 1), thus forming a tightjoint along the whole edge of the latter and preventing the entrance of grease or other foreign matter into said joint. The operation of compressing the sides of the locking-piece (which were straight when applied) brings them together somewhat in curved lines, as shown in Fig. (3, the effect being to stretch the sheet metal A, which forms the body of the pan, so as to makeitperfectly flat, and also to make the wire rim symmetrical on each side of the surface, thus permitting either side of the sheet to be used at will. It will thus be seen that not only is the construction of the pan simplified and cheapened, but the doubled metal of the locking-piece 1) around the edge, where breakage generally occurs, strengthens the structure at the needed points, and the body A of the pan being under the strain before referred to a flat and uniform surface is preserved. The fastening by means of the locking-piece also permits the use of 10 gaging withone or both sides of the lockingpiece.

I have specified the above method of construction as the best known to me; but I do not desire to limit my claim to the exact form 15 described; and

I therefore claim I The combination, with a pan-body or similar structure having in the vicinity ofits edges inwardly-projecting portions, of a rim consisting of an outer rigid body having on its inner sides locking-pieces which lap over and 'engagewith the inwardly-projecting portions of the pan-body, substantially as and for the purpose set forth.

J. HENRY MITCHELL.

Witnesses:

7M. H. MYERs, F. W. WEST. 

